With Year Ones expert advice, we pieced together a cooling system that should work for all 65-67 vintage 455 retrofits. The heavy-duty four-core radiator (PN FJL15) works with a late-style water neck (PN 9435N) and upper/lower radiator hoses (PN ID436/ ID591). Dont forget a filler cap (9004N) and drain petcock (5372N). A five-blade fan and thermostatic clutch (PN 6500N/9189N) and fan shroud (PN F94) keep the big-cube 455 rock-steady at 180 degrees. We modified our light-duty radiator brackets to work with the new, thicker-core radiator, but Year Ones kit (PN FP20891) achieves the same thing, only more easily.